Joint insert for installation in the joint region of two floor sections of an industrial floor, method for producing the joint insert, and use

Abstract

The invention relates to a joint insert (1) for installation in the joint region of two floor sections of an industrial floor, having a support unit (20) which forms a joint bridge (2) which can be driven over and which has two - a first and a second - support parts (21, 21') which face one another in the joint region at a dividing line (22) and the upper outer surface of which, in the installed state, can be matched to the surface level of the laterally adjacent floor sections, and the underside of which is attached to a substructure (3) which can be installed or is installed in the joint region and which has two construction parts (30, 30') which are coupled to one another so as to be displaceable in the direction of the joint width of the floor joint and of which in each case one is connected in a force-fitting manner to one of the support parts (21, 21') and is anchored or can be anchored to a facing floor section. Assembly and machining is facilitated by the fact that the support parts (21, 21') are made at least 1 cm or 2 cm thick, perpendicularly to their outer surface, from plastic material which can be sanded-down at least on the upper side.

Description

[0001] JECK, FLECK & PARTNER mbB P.O. Box 14 69 • D-71657 Vaihingen / Enz

[0002] PAT EN TA N WÄ LT E Telephone (07042) 9728 - 0

[0003] Fax (07042) 9728 - 11

[0004] A 25494-PCT - HF / construction October 8, 2025 Floorllnited GmbH

[0005] Industrial Park 21

[0006] 4101 Feldkirchen an der Donau AUSTRIA

[0007] - 1 -

[0008] Joint insert for installation in the joint area of ​​two floor sections of an industrial floor, method for manufacturing the joint insert and use

[0009] The invention relates to a joint insert for installation in the joint area of ​​two floor sections, in particular an industrial floor, with a support unit forming a drive-over joint bridge, which has two support parts – a first and a second – facing each other at a dividing line in the joint area and whose upper outer surface can be adjusted to the surface level of the laterally adjacent floor sections in the installed state and which is attached with its underside to a substructure that can be installed or is installed in the joint area, which has two construction parts slidably coupled to each other in the direction of the joint width of the floor joint, one of which is positively connected to one of the support parts and is anchored or can be anchored to an adjacent floor section.Furthermore, the invention relates to a method for manufacturing a joint insert, in which two support parts of a support unit are applied to a respective structural component of a substructure composed of structural components, and to the use of a joint insert. A 25494-PCT - HF / bau - 2 - October 8, 2025.

[0010] A joint insert of this type is described in DE 10 2020 201 686 A1. In this known joint insert, a support unit consisting of two support elements adjacent to each other along a dividing line is supported on a substructure and fastened to support legs of the same by means of screws. The substructure is designed for installation in the joint area between two sections of an industrial concrete floor and comprises two structural elements, one of which is anchored in each corresponding floor section. The two structural elements are held together, particularly for assembly, by means of coupling elements, e.g., plastic screws and clamps, in such a way that they can move away from each other along with the floor sections as the concrete shrinks during the drying process.To transfer shear forces, a reinforcing strip extending both laterally and longitudinally to the joint is arranged in the substructure between the two structural components. Once the flooring material has fully cured, the support unit can be removed from the substructure. Elastic joint sealant can then be poured into the recess formed by the support unit in the joint area to create a smooth, homogeneous surface suitable for vehicular traffic. This procedure requires subsequent assembly work and a corresponding amount of labor.

[0011] Another joint insert for installation in the joint area between two floor sections of an industrial floor, in which a support unit is attached to a substructure by means of screws, is shown in DE 20 2005 008 762 U1. Here, too, the substructure is composed of two structural parts that are anchored or can be anchored in the joint area of ​​the two floor sections and can move with them as the concrete shrinks. The cover unit consists, for example, of two identical cover plates adjacent to each other in the area of ​​a dividing line. A similar substructure, designed as a day-span support, is shown in EP 1 293 606 B1. A 25494-PCT - HF / bau - 3 - October 8, 2025

[0012] A joint insert is also shown in GB 2 500 626 A. In this known joint insert, which can be installed as a joint bridge in an industrial floor, a support unit consists of two support parts with a wavy dividing line. The support parts are made of metal or plastic and are also slidable in the width direction (along the wavy line) on the two floor sections opposite each other at the joint area. They rest on support sections angled outwards from the joint, which have anchoring elements for anchoring in the concrete.

[0013] US 5 450 699 A shows another joint insert for installation between floor sections of an industrial floor and WO 2014 / 096980 A1 also presents a joint insert for installation between two floor sections.

[0014] DE 10 2016 100 174 B3 discloses a drive-over joint bridge in the transition area of ​​hall floors, in which a recess is formed on both sides of the joint in the upper joint area. This recess is filled with a grindable elastic filler compound, into which an insert arrangement running longitudinally along the joint is placed. The surface of the filler compound and the insert arrangement is ground flush with the adjacent floor areas.

[0015] DE 197 05 531 A1 discloses a device for bridging expansion joints on bridges, wherein support parts with a tooth-shaped separation line are placed on a substrate and a connection with lamellae is made by a welding or adhesive connection.

[0016] WO 2013 / 057 299 A1 specifies a device made of composite material which can be used, for example, to bridge a joint area in a concrete floor. The supporting elements can be made of a sandable plastic material and provided with reinforcing fibers.

[0017] DE 10 2018 112 634 A1 discloses a joint profile used as permanent formwork in the production of floor panels of an industrial floor. The joint profile features formwork elements angled at right angles to the joint opening, which are connected to each other via a connection that automatically releases as the concrete panels shrink.

[0018] US patent 2017 / 0037644A1 discloses an insert for joining industrial floors with two synthetic resin support plates with a metal cladding, joined by a wavy separation line. Deformable material is incorporated in the separation area.

[0019] The KR 10 2004 0 022 613 A shows a joint bridging for bridges, with a support unit consisting of two support parts joined together via a wavy dividing line.

[0020] The present invention is based on the objective of providing a joint insert and a method of the type mentioned at the outset, which results in a joint bridge that is as smooth as possible, easily traversable, and requires as little assembly and rework effort as possible.

[0021] This problem is solved according to the invention in a joint insert having the features of claim 1 and a method for its manufacture having the features of claim 12.

[0022] The joint insert is designed so that the bearing parts are at least 1 cm or at least 2 cm thick perpendicular to their outer surface, e.g. about 2.5 cm or about 3 cm A 25494-PCT - HF / bau - 5 - 8 October 2025, and are made of material that can be sanded at least on the upper side, in particular plastic material.

[0023] The process involves the use of surface-mounted support parts that can be sanded on the top side and are glued onto the respective structural component.

[0024] The use of a joint insert according to any one of claims 1 to 11 for bridging a floor joint between floor sections of an industrial floor, wherein the installed joint insert is ground flush with the surface level of the adjacent floor sections on its outer surface, also offers significant advantages. For the purposes of this document, "industrial floor" is understood to mean the entire floor structure of an industrial hall floor.

[0025] The joint insert, designed in this way, can be easily installed in the joint area of ​​the floor sections and, during the construction of the floor sections, embedded in concrete in such a way that the surface level of the support unit with its bearing elements is aligned with the surface level of the adjacent floor sections. After a drying process, which also involves a so-called cupping at the edges of the floor sections and a resulting height offset between the floor sections, the grindable bearing elements, which have a sufficiently high thickness of preferably more than 20 mm, e.g., 25 mm or 30 mm, can simply be ground down to create a smooth, drivable bridge with a level transition to the surface of the adjacent floor sections.The fastening, in particular bonding, of the support elements to the upper side of the associated structural components results in a force-fit connection, especially along the entire length. Reinforcing material advantageously present in the lower area, preferably the lower half, of the support elements contributes significantly to the long-term stability of the resulting joint bridge. Furthermore, a visual marker, e.g., a reinforcing insert (A 25494-PCT - HF / bau - 6 - October 8, 2025) or a colored inlay, can advantageously be incorporated in the upper area, preferably the upper half, to ensure that the required thickness of the support elements is still present even after repeated sanding.

[0026] An advantageous design of the joint insert in the area of ​​the support unit for driving over the formed joint bridge consists in the fact that the dividing line running longitudinally along the floor joint with respect to an installation state alternately, in particular in a wavy line, overlaps the joint edges in plan view, so that the support elements in the longitudinal direction of the floor joint alternately cover it in the width direction with their laterally projecting support sections, whereby the support sections projecting over the floor joint rest unconnected on the underlying structural element, or whereby the binding force of the support sections on the underlying structural element is selected to be so low that the respective support element remains fixedly connected to the structural element associated with it when they move apart after installation in the floor sections due to shrinkage. The alternating, e.g.The wavy, contoured dividing line offers significant advantages when driving over the joint area, even if a gap appears in the area of ​​the dividing line due to shrinkage of the concrete mass of the floor sections. The transition between the outer edge of the support elements and the adjacent edge of the floor sections on the upper surface remains virtually unchanged due to the positive connection of the components to the structural elements anchored in the concrete on both sides.

[0027] The high stability of the joint insert is enhanced by the fact that at least the lower layer, located in the lower area, approximately in the lower half, of each of the two support parts is reinforced, in particular by means of a glass fiber reinforced insert.

[0028] Further advantages for processing arise from the fact that even in the upper layer of the support parts, located in the upper area, approximately in the upper half, an A 25494-PCT - HF / bau - 7 - 8 October 2025

[0029] An insert or marking medium is incorporated, wherein the distance of the insert or marking medium from the top surface specifies a maximum permissible grinding depth.

[0030] An advantageous embodiment for the force-fit connection between the support elements and the associated structural components consists in the support elements being bonded to their respective structural components by means of an adhesive. The protruding support sections of the support elements along the dividing line according to claim 2, and correspondingly the area of ​​the opposing structural components, are either not coated with adhesive, so that when the bottom sections shrink, the support elements move along with their associated structural components, or the entire upper surface of the structural components is coated with adhesive and the underside of the support sections is provided with a means that largely reduces or eliminates adhesion in this area, such as with an adhesive tape with the non-stick surface facing the adhesive layer.

[0031] An advantageous design for a reliable, intimate connection between the relevant areas of the support elements and / or the structural elements of the substructure and the adjacent surfaces of the floor sections consists in the fact that the outer surfaces of the support unit and / or at least partially of the substructure, which come into contact with the floor sections during installation, are provided with a bonding layer for a material-bonded connection with the floor sections, in particular with their cementitious material.

[0032] An advantageous design of the joint insert for assembly and function is further characterized by the fact that the two structural components are at least partially made of metal or plastic and are held together for assembly by means of clamps and / or plastic screws, which allow the structural components to move along with the floor sections when the concrete shrinks. A 25494-PCT - HF / bau - 8 - October 8, 2025

[0033] For reliable anchoring of the structural components in the floor sections, it is advantageously provided that the structural components have laterally projecting outwards, when installed away from the floor joint into the assigned floor sections, anchoring elements, e.g. screwed, welded or glued on.

[0034] Another advantageous measure for installing the joint insert is that, in addition to other coupling devices, the structural components are connected to each other via shear force domes or a longitudinal strip for shear force absorption. This counteracts shear forces between the floor sections that cause vertical displacement. This largely prevents larger vertical displacements. Minor displacements in the joint area can be relatively easily remedied by grinding down the surface of the bearing elements. The shear force domes or longitudinal strip are installed in such a way that the structural components can move laterally along the joint as the concrete shrinks.

[0035] For manufacturing and function, it is also advantageous that the support parts are each mounted on a flat support section which is angled horizontally outwards in a plane perpendicular to the longitudinal direction of the floor joint with respect to the installation state and whose longitudinal edge area facing away from the floor joint preferably protrudes slightly (e.g. less than one third or less than one quarter or one fifth of their width) beyond the longitudinal edge of the respective support section.

[0036] For the installation of the joint insert, it is also advantageous that the structural components have support elements and attached feet, by means of which they are supported or can be supported on a substrate in the joint area during installation. The structural components can be equipped with height-adjustable elements in the area of ​​the support elements or feet for precise height adjustment, or the feet can be shimmed with height-adjustable elements during installation. A 25494-PCT - HF / bau - 9 - October 8, 2025

[0037] A vertically arranged drag plate, running the length of the joint insert, can be inserted between the structural components and the support elements to separate the concrete masses of the floor sections during installation.

[0038] An advantageous measure for the function of the method for manufacturing a joint insert consists in the fact that the two support parts are formed complementarily to each other in a wavy line shape on longitudinal edges facing each other before being applied to the structural parts, so that the respective protruding support sections, with respect to the installation state, bridge the floor joint up to and beyond the inner edge area of ​​the opposite structural part and are at least substantially unfastened and movable there.

[0039] Advantageous features of the process also include the insertion of a reinforcing layer into the support parts during manufacturing, in a sublayer located in the lower area, for example in the lower half, and the inclusion of a marking in the support parts to specify a maximum permissible grinding depth.

[0040] Insofar as the terms vertical and horizontal, as well as their variations, and the terms bottom, top, and their variations (such as underside, topside) are used in this application, they refer to the direction of gravity or are to be understood geodetically, unless otherwise stated. Adjacent means, in this context, across a small gap or immediately adjacent, unless expressly specified.

[0041] The invention is explained in more detail below with reference to exemplary embodiments and the drawings. The drawings are shown in: A 25494-PCT - HF / bau - 10 - October 8, 2025

[0042] Fig. 1 shows a joint insert in a perspective view from an oblique angle above with substructure and support unit,

[0043] Fig. 2 shows an end section of the joint insert according to Fig. 1 in perspective view,

[0044] Fig. 3 shows a substructure with two structural parts and a trailing plate arranged between them in a perspective view from an oblique angle above.

[0045] Fig. 4 shows an end-face view of a substructure according to Fig. 3,

[0046] Fig. 5 shows a front view of a joint insert with a substructure according to Fig. 4 and a shear force dowel guided through it, as well as a joint bridge applied to the substructure.

[0047] Fig. 1 shows an embodiment of a joint insert 1 with a substructure 3 and a joint bridge 2 arranged on its upper surface. The joint insert 1 is used in the joint area between two (not shown) floor sections during the construction of a drive-over floor, in particular an industrial floor, for example in the transition area between two halls, and is embedded in the floor sections facing each other in the joint area when the concrete is poured. The substructure 3 consists, for example, at least largely of metal and / or correspondingly resistant and load-bearing plastic.

[0048] The joint bridge 2 has a support unit 20, which is attached to the top of the substructure 3 using fasteners. The support unit 20 has a first support part 21 and a second support part 2T, which are joined closely together along a dividing line 22 in the joint area and are flat on their outer surface, such that, in the installed state, their upper outer surface transitions as closely as possible to the surface level of the adjacent floor sections, i.e., usually horizontally.

[0049] In the illustrated embodiment, the dividing line 22 between the two support parts 21, 2T does not run straight, but alternately in the longitudinal direction over the joint area, in particular in a wavy line shape, for example sinusoidally, wherein the sections of the two support parts 21, 2T projecting transversely with respect to the longitudinal direction of the joint are complementary to each other and the projecting sections form respective support sections 210, 210' which project over the floor joint in the installed state (in top view).

[0050] The support unit 20 is mounted on flat support sections 301, 30T of the substructure 3, which extend longitudinally (in the installed state in the joint direction) and perpendicularly thereto in the width direction, and preferably over the entire length and more than half the width of the support unit 20, in order to form a stable support surface for the support elements 21, 21', as illustrated in the enlarged view in Fig. 2. In the illustrated embodiment, the support sections 301, 30T, which are horizontally oriented in the (normal) installed state, form right-angled bends on (vertical in the installed state) support webs 300 of structural elements 30, 30' of the substructure 3.

[0051] The structural components 30, 30' are each assigned to one of the floor sections facing each other in the joint area during installation and are largely embedded in the concrete during the pouring process to securely anchor them in the floor sections. For the installation of the joint insert 1, the two structural components 30, 30' are securely fixed to each other by means of coupling elements, but in such a way that they can move apart with the floor sections as the floor material shrinks and the floor joint widens. For this purpose, the coupling elements of the structural components 30, 30' include, for example, plastic screws and / or clamps or retaining clips.

[0052] Laterally, the structural components 30, 30' are provided with stirrup-like support elements 31 on the support webs 300. These elements have inner support legs (vertical in the installed state) attached to the support webs 300 and foot sections 310 attached to their underside. In a front view of the joint insert 1, the support elements 31 are designed, for example, as rectangular (see Figs. 1 to 5) or C-shaped stirrups, with the foot sections 310 forming lower stirrup legs and vertical outer support legs on the side facing away from the joint. These outer legs are bent at right angles to the joint at the top and transition via upper stirrup legs 312 into downwardly bent contact sections that are attached (e.g., welded, glued, or screwed) to the respective associated support web 300.

[0053] As shown in Fig. 2 and Fig. 5, the first and second support parts 21, 2T have two areas in the thickness direction, or vertically, wherein a lower layer 24 is formed as a reinforcing layer, in particular with a glass fiber fabric and suitable cured plastic material or plastic binder, and the upper layer 23 above it is formed from a grindable, stable layer material, in particular resistant plastic material, for example thermosetting material, wherein the plastic material of the lower layer 24 and the upper layer 23 can be the same.

[0054] The first and second support parts 21, 2T are force-fitted onto the support section 301 and 30T of the respective associated structural part 30, 30', wherein an adhesive is preferably used as the fastening means (compared to, for example, a screw connection), which results in a stable, material-bonded connection and can advantageously be applied as a large-area adhesive layer 25 to the support section 301, 30T, as shown in Fig. 5. The adhesive layer 25 is advantageously applied over the entire length of the respective support part 21, 21', but the respective support sections 210, 210', which extend transversely across the joint area (in plan view) to the opposite support section 30T or 301, are not or at most weakly bonded with the adhesive, so that the first and the second support part 21, 2T are bonded to the associated, firmly anchored in the respective floor section orThe structural component 30, 30' to be anchored can move along with the shrinkage of the concrete and the widening of the floor joint. A bearing surface for the support sections 210, 210' on the relevant areas of the load-bearing sections 30T and 301 without adhesive bonding is achieved by leaving this area free of adhesive. A weak bond, if any, is achieved by applying an anti-stick agent, e.g., anti-stick tape, in the area between the support sections 210, 210' and the load-bearing sections 30T and 301. The support sections 210, 210' are also supported downwards by the respective opposing load-bearing sections 30T and 301, so that they exert high support forces when the joint bridge 2 is traversed.

[0055] As shown in Fig. 5, the support unit 20 with the first and second support parts 21, 2T and / or the structural parts 30, 30' of the substructure 3 are, in areas where they come into contact with the concrete or cement material of the floor sections, at least largely provided with a bonding layer 26 for a durable connection, which also forms a good seal between the adjacent or neighboring material partners. Such a material is based, for example, on the CEMflex technology of BPA GmbH.

[0056] As further shown in Figures 1, 2, and 5, the support sections 301, 30T, which are advantageously mirror-symmetrical, extend in the width direction over more than half, preferably over more than two-thirds or more than three-quarters, of the width of the respective associated support part 21, 2T, but preferably do not extend quite to its outer longitudinal edge. A 25494-PCT - HF / bau - 14 - October 8, 2025

[0057] Figures 3 and 4 show an embodiment of the substructure 3, in which a slip plate 36 is inserted between the (vertical in the installed state) support struts 300 of the structural components 30, 30'. This slip plate extends over the entire length of the substructure and its lower edge reaches approximately to the base sections 310 of the support elements 31. During the installation of the joint insert, this slip plate serves to prevent the flow of still-flowable concrete material into the area of ​​the other floor section. The anchoring elements, which project laterally in the width direction of a joint during installation in the floor sections, are also clearly visible.

[0058] Fig. 5 shows the substructure 3 corresponding to Fig. 4 and additionally the support unit 2 with the support parts 21, 21', which is applied to the support sections 301, 30T. In the support unit 2, inserts 27, e.g., made of fiberglass material or a fiberglass fabric, are incorporated for reinforcement in its upper region (top layer 23) and in its lower region (bottom layer 24). The upper insert 27 also serves as a marking aid or control point to indicate the maximum permissible removal thickness of the top layer during grinding. For example, the total thickness of the support unit 2 when installed is at least 20 mm, 25 mm, or 30 mm, and the specified removal thickness above the upper insert 27 is at most 12 mm, 10 mm, or 6 mm, so that a sufficient permissible thickness of the underlying support layer of the support unit 2 always remains.Instead of the upper insert 27 or additionally, another marking agent for the permissible removal thickness can also be used in the support unit 2 as a marking aid, such as a dye or the like inserted into a longitudinal groove or longitudinally spaced bores.

[0059] As further shown in Fig. 5, the support parts 21, 2T are firmly bonded to the respective associated support sections 301, 30T by means of an adhesive layer 25, whereby the A 25494-PCT - HF / bau - 15 - 8 October 2025

[0060] The adhesive layer 25 advantageously extends over the entire length between the support sections 301, 30T and the bearing sections 21, 2T. In the width direction, the adhesive layer 25 can be omitted in the area of ​​the bearing sections 210, 210' or it can be applied there, in which case a non-stick layer is arranged in the area of ​​the bearing sections, such as a tape adhered to the underside of the bearing sections 210, 210' with a non-stick surface facing the adhesive layer 25. Such an adhesive tape can be applied across the entire width of the support sections 210, 210' and also across the separation joint between the support sections 21, 2T, since it tears easily along the separation line when the two structural parts 30, 30' are moved apart due to shrinkage in the installed state, as the adhesive layer 25 provides sufficient bonding strength between the remaining areas of the support parts 21, 2T. Furthermore, Fig.5 also the aforementioned binding layer 26, which in the installed state provides a stable, adhesive and sealing connection between the support parts 21, 2T and the adjacent floor sections and can advantageously also extend into the lower area of ​​the support sections 301, 30T and, if desired, even further below the support sections 301, 30T, e.g., into the area of ​​the support webs 300.

[0061] Furthermore, Fig. 5 shows a shear force dowel 33 for shear force reinforcement, which counteracts a vertical displacement of the structural parts 30, 30' relative to each other and thus also of the support parts 21, 2T. Such shear force dowels 33 are inserted along the entire length of the substructure in openings 34 (e.g., at intervals of a few decimeters, e.g., 50 cm) in the trailing plate 36 and / or the support webs 300 of the structural parts 30, 30', whereby, as Fig. 5 shows, guide sleeves 35 projecting horizontally laterally towards the bottom sections around the openings 34 on the structural parts 30, 30' or the trailing plate 36, e.g., welded or glued on.The shear dowels 33 extend horizontally and perpendicularly to the longitudinal direction of the substructure into the concrete material of the floor sections after installation, being loosely inserted into the passages, so that the structural parts 30, 30' after installation at A 25494-PCT - HF / bau - 16 - 8 October 2025.

[0062] The shrinkage of the concrete allows them to move apart accordingly. As an alternative to the shear dowels 33, a longitudinal strip integrated into the substructure (similar to that described in the aforementioned DE 10 2020 201 686 A1) could be used for shear reinforcement.

[0063] The support elements 21, 21', which are force-fitted to the respective support sections 301, 30T, and in particular firmly attached using an adhesive, can be easily inserted together with the substructure 3 in the joint area between the floor sections of the industrial floor to be produced and aligned so that the upper outer surface of the support unit 20 coincides with the surface level of the two floor sections to be produced. Any height difference caused by cupping in the areas of the floor sections adjacent to the joint during the drying process can subsequently be easily leveled and smoothed by grinding down the transition areas between the floor sections and the support elements 21, 2T or the entire surface of the support unit 20, so that the resulting joint bridge 2 can be driven over virtually without vibration, a characteristic further enhanced by the wavy dividing line 22 seen from above.If leveling or smoothing is required after a certain period of time, rework can be easily carried out by further sanding. The structure of the support parts 21, 2T with the reinforcing underlayer 24 results in high stability, and the upper insert or other marking element provides an advantageous way to check whether sufficient thickness of the support unit 20 is still present for rework.

Claims

A 25494-PCT - HF / construction - October 17 - 8, 2025 Claims 1. Joint insert (1) for installation in the joint area of ​​two floor sections, in particular an industrial floor, with a support unit (20) forming a drive-over joint bridge (2), which has two support parts (21, 2T) facing each other in the joint area at a dividing line (22) and whose upper outer surface can be adjusted to the surface level of the laterally adjacent floor sections in the installed state and which is attached with its underside to a substructure (3) that can be installed or is installed in the joint area, which has two construction parts (30, 30') slidably coupled to each other in the direction of the joint width of the floor joint, each of which is positively connected to one of the support parts (21, 2T) and is anchored or anchorable to an adjacent floor section, characterized in that the support parts (21,2T) are formed perpendicular to their outer surface at least 1 cm or at least 2 cm thick from material that can be sanded at least on the upper side, in particular plastic material.

2. Joint insert (1) according to claim 1, characterized in that the dividing line (22) extending longitudinally along the floor joint with respect to an installation state alternately, in particular in a wavy line shape, overlaps the joint edges in plan view, so that the support parts (21, 2T) alternately cover the floor joint in the longitudinal direction with their laterally projecting support sections (210, 210'), wherein the support sections (210, 210') projecting beyond the floor joint rest unconnected on the underlying structural part (30, 30') or wherein the bonding force of the support sections (210, 210') on the underlying structural part (30, 30') is selected to be so low that the respective support part (21, 2T) A 25494-PCT - HF / bau - 18 - 8 October 2025 remains permanently connected to its associated structural component (30, 30') if these move apart after installation in the floor sections.

3. Joint insert (1 ) according to claim 1 or 2, characterized in that at least the lower layer (24) of each of the two support parts (21 , 21 ') located in the lower area, approximately in the lower half, is reinforced, in particular by means of a glass fiber reinforced insert (27).

4. Joint unit (1 ) according to one of the preceding claims, characterized in that an insert (27) or a marking means is also provided in the upper layer (23) of the support parts (21 , 21 ') located in the upper area, approximately in the upper half, wherein the distance of the insert (27) or the marking means from the top side specifies a maximum permissible grinding depth.

5. Joint insert (1 ) according to one of the preceding claims, characterized in that the support parts (21 , 21 ') are each positively connected to the associated construction part (30, 30') by means of an adhesive.

6. Joint insert (1) according to one of the preceding claims, characterized in that the outer surfaces of the support unit (20) and / or at least partially also of the substructure (3) which come into contact with the floor sections during installation are provided with a bonding layer (26) for a material-bonded connection with the respective adjacent floor section, in particular with the cement building material. A 25494-PCT - HF / construction - October 19 - 8, 2025 7. Joint insert (1) according to one of the preceding claims, characterized in that the two construction parts (30, 30') consist at least partially of metal or plastic and are held together for assembly by means of clamping parts and / or plastic screws which allow the construction parts (30, 30') to move along with the floor sections when the floor material shrinks.

8. Joint insert (1 ) according to one of the preceding claims, characterized in that the construction parts (30, 30') have anchoring parts (32) projecting laterally outwards when installed away from the floor joint into the associated floor sections.

9. Joint insert (1 ) according to one of the preceding claims, characterized in that the structural parts (30, 30') are coupled to each other via shear force dowels (33) or via a longitudinal strip in addition to further coupling means in order to counteract shear forces which cause a vertical displacement.

10. Joint insert (1 ) according to one of the preceding claims, characterized in that the support parts (21 ,21 ') are each mounted on a flat support section (301 , 301 ') which is angled horizontally outwards with respect to the installation state in a plane perpendicular to the longitudinal direction of the floor joint and which project with their longitudinal edge area facing away from the floor joint beyond the longitudinal edge of the respective support section (301 , 30T). A 25494-PCT - HF / construction - October 20 - 8, 2025 11. Joint insert (1) according to one of the preceding claims, characterized in that the construction parts (30, 30') have support elements (31) and foot parts (310) arranged thereon, by means of which they are supported or can be supported in the joint area during installation.

12. Method for producing a joint insert (1) according to one of the preceding claims, in which two support parts (21, 21') of a support unit (20) are applied to a respective construction part (30, 30') of a substructure (3) composed of construction parts (30, 30'), characterized in that support parts (21, 21') that can be sanded on their upper surface are used and are glued onto the respective construction part (30, 30').

13. Method according to claim 12, characterized in that a reinforcing insert (27) is introduced into the support parts (21 , 21 ') during manufacturing in a sublayer (24) located in the lower area, in particular in the lower half.

14. Method according to claim 12 or 13, characterized in that a marking is provided in the support parts (21 , 21 ') to specify a maximum permissible grinding depth.

15. Method according to claim 10, characterized in that the two support parts (21 , 21 ') are aligned complementarily at their longitudinal edges facing each other before being applied to the construction parts (30, 30'). A 25494-PCT - HF / bau - 21 - 8 October 2025 are shaped in a wavy line shape so that, with respect to the installation state, the respective projecting support sections (210, 210') bridge the floor joint to beyond the inner edge area of ​​the opposite structural part (30' or 30) and rest there unfastened and slidably.

16. Use of a joint insert (1 ) according to one of claims 1 to 9 for bridging a floor joint between floor sections of an industrial floor, characterized in that the installed joint insert (1 ) is ground flat on its outer surface to the surface level of the adjacent floor sections after a drying process.

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